mozilla/webvtt — pull request #143 by caitp (2013-02-21 21:36:21+00:00)
Title: parser.c: Remove ASCII_XXX definitions, use those from string_internal.h

In parser.c remove these:
```C
#define ASCII_TAB (0x09)
#define ASCII_DASH (0x2D)
#define ASCII_GT (0x3E)
#define ASCII_DASH (0x2D)
```
And wherever they are used, use corresponding values from string_internal.h